40 days cycle and longer??

kimhun
does anyone ever had long cycle more than 28 days? I am so worry because My period alway late and unexpecting. now I am having a month skip of having period:( . I didnt have my period last month and now this new month I suppose to have my period which 3 days lated today. anyone ever had this problem? It negative last month when i check. havent check it again yet.